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  <title>Removes a variable from shared memory</title>
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  <div id="layout-content"><div id="function.shm-remove-var" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">shm_remove_var</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">shm_remove_var</span> &mdash; <span class="dc-title">Removes a variable from shared memory
  </span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.shm-remove-var-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>shm_remove_var</strong></span>(<span class="methodparam"><span class="type"><a href="class.sysvsharedmemory.html" class="type SysvSharedMemory">SysvSharedMemory</a></span> <code class="parameter">$shm</code></span>, <span class="methodparam"><span class="type">int</span> <code class="parameter">$key</code></span>): <span class="type">bool</span></div>

  <p class="para rdfs-comment">
   Removes a variable with a given <code class="parameter">key</code>
   and frees the occupied memory.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.shm-remove-var-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">shm</code></dt>

     <dd>

      <p class="para">
       A shared memory segment obtained from <span class="function"><a href="function.shm-attach.html" class="function">shm_attach()</a></span>.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">key</code></dt>

     <dd>

      <p class="para">
       The variable key.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.shm-remove-var-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>true</code></strong>， 或者在失败时返回 <strong><code>false</code></strong>。
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.shm-remove-var-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>8.0.0</td>
       <td>
        <code class="parameter">shm</code> expects a <span class="classname"><a href="class.sysvsharedmemory.html" class="classname">SysvSharedMemory</a></span>
        instance now; previously, a <span class="type">resource</span> was expected.
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>

 
 <div class="refsect1 seealso" id="refsect1-function.shm-remove-var-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.shm-remove.html" class="function" rel="rdfs-seeAlso">shm_remove()</a> - Removes shared memory from Unix systems</span></li>
   </ul>
  </p>
 </div>


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